pkg/covermerger: use filepath.Join instead of plus

2 files changed, 3 insertions, 2 deletions

diff --git a/pkg/covermerger/covermerger_test.go b/pkg/covermerger/covermerger_test.go
index f01599bf6..035e5972d 100644
--- a/pkg/covermerger/covermerger_test.go
+++ b/pkg/covermerger/covermerger_test.go
@@ -139,7 +139,7 @@ func (m *fileVersProviderMock) GetFileVersions(c *Config, targetFilePath string,
 ) (fileVersions, error) {
 	res := make(fileVersions)
 	for _, rbc := range rbcs {
-		filePath := c.Workdir + "/repos/" + rbc.Commit + "/" + targetFilePath
+		filePath := filepath.Join(c.Workdir, "repos", rbc.Commit, targetFilePath)
 		if bytes, err := os.ReadFile(filePath); err == nil {
 			res[rbc] = string(bytes)
 		}
diff --git a/pkg/covermerger/provider_monorepo.go b/pkg/covermerger/provider_monorepo.go
index 32da2f8a5..4f908606f 100644
--- a/pkg/covermerger/provider_monorepo.go
+++ b/pkg/covermerger/provider_monorepo.go
@@ -5,6 +5,7 @@ package covermerger
 
 import (
 	"fmt"
+	"path/filepath"
 	"sync"
 
 	"github.com/google/syzkaller/pkg/log"
@@ -75,7 +76,7 @@ func (mr *monoRepo) addRepoCommit(rbc RepoCommit) {
 }
 
 func MakeMonoRepo(workdir string) FileVersProvider {
-	rbcPath := workdir + "/repos/linux_kernels"
+	rbcPath := filepath.Join(workdir, "repos", "linux_kernels")
 	mr := &monoRepo{
 		repoCommits: map[RepoCommit]struct{}{},
 	}